Emery-wheel



(No Model.)

A. BALL.l

UNITED STATES PATENT OEEICE.

ALBERTBALL, OF CLAREMONT, NEW HAMPSHIRE.

EMERY-WHEEL.

SPECIFICATION formingApart` of Letters Patenty No. 277,659, dated May 15, 1883.

Application filed March 21, 188;?. (No model.)

To all 10h-om it may concern: y

Be it known that I, ALBERT BALL, of Claremont. in the county of Sullivan and State of N ew Hampshire, have invented a new and useful Improvement in Emery-VVheels; and Ido hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The object of the invention, which is to be hereinafter described and illustrated, is to so construct emery or other grinding and polishing wheels that thegreatest strength will be obtained in conjunction with the lightest weight.

'lo the accomplishment ofthe above the invention consists, first, in providing said shell with suitable stiffeners,77 which serve the double purpose of strengthening said wheel and affording means for holding the filling mechanism thereon, and, second, in the novel method and means employed for supplying the grinding material to the shell. All these features are clearly shown in the accompanying drawings, which form part of this specilication. and in which- Figure l is a. central vertical section of a wheel embodying my invention, Fig. 2, a sectional view taken on the line a' a', Fig. l, and showing the manner of supplying the grinding material to the wheel. y

Lilie letters refer to corresponding parts in the several views. l

In the drawings, A represents a hollow wheel provided atits center with a sui table arbor-bear ing,B, and with radial arms or spokes G. Upon the outer edges ofthe shell A are formed suitable flanges, D D, which extend a suitable distance above the rim of said shell, and have their inner faces sloping sufficiently to overlap the grinding material Ef, which is placed upon the outer circumference of shell A and between the anges D D. These flanges D D may be cast with the shell, or may be secured there to in any suitable manner; or one may be cast with the shell and the other removably secured thereto. The face or outer circumference of shell A is concaved or recessed, the deepest point being at its center and midway between the anges D D. When the grinding material has been applied to the shell, its outer surface being perfectly even throughout, it follows that its greatest thickness will be at the point where the concavity formed between the flanges D D is the deepest-1i. e., midway betweenl said iianges, or at the center of the face of shell A. p I have found by frequent eX- periment that this construction is very desirable, and that itv adds strength to the wheel and renders the displacement or breakage yof the grinding material less liable; but I lay no claim in this application to the construction thus far described, as it will form the subjectmatter of another application to be filed.

Around the edges of the inner circumference of shell A are formed the stiifeners F, which serve to strengthen said shell without adding much to the weight of the same, and are further used to receive and hold hook-shaped bolts G, used in connection with the devices for filling the wheel with grinding material, as will now be described.

To cover the surface of the wheel with grinding material I tirst secure over the coneavity formed between flanges I) D a lag, H, which is held securely in place by hook-shaped bolts Gr, before mentioned, the hooked ends of which are passed around the stiffeners F. Upon the opposite or outer ends of bolts Gr nuts I are secured, by means of which said bolts and the lag H are held in position. Upon the upper face of flanges D l), and between said flanges and lag Il, suitable strips, K, are placed, in order that the grinding material may extend slightly above the flanges D D. After the lag H has been secured on the shell in the manner described a board, J, is placed upon the shell. This board J is placed vertically, and extends from the top of lag II down to the face of the shell, having its lower end made to conform to the shape of said shell and .titting as closely as possible over the projections E, formed between the flanges l) D, when the construction shown in Fig. 3 is employed. This board J having been placed upon the shell, as described, another lag H is secured to said shell in the same manner as before mentioned, and .into the space formed between the face of the shell and this second lag the grinding material is forced, the board J forming an abutment against which the said material is forced. rIhese steps having been taken and the grinding material tamped as hard as possible, another lag is secured upon the shell in front ofthe second lag mentioned and the space formed under said lag filled, as above described. This is continued until the entire grinding-surface is formed, the board or abutment J being removed previous to the filling of the last space. In Fig. 2 of the drawings I have clearly illustrated the means employed in this lling process.

Having thus described my invention, what I claim as new therein, and that for which I desire to secure Letters Patent, is-

1. The Within-described method of applying grinding material to a wheel, which consists of securing tosaid Wheel lags and an abutment and then forcing the material into the space formed between the surface ot'` the Wheel r 5 and the lags, substantially as'described.

2. In the grinding and polishing wheel described, the shell A, provided with stiffeners F, and in combination with bolts G and lags H, as and for the purpose set forth.

This specification signed and witnessed this 1st day of March, 1882.

ALBERT BALL. Witnesses:

HERMON HoL'r,

N. M. BALL. 

